Safety device and holder for doors



Nov. 9 1926. 1,606,641

' A. KELLER SAFETY DEVICE AND HOLDER FOR DOORS N I INVENTOR. 0Q A. /KELL FR BY R ATTORNEY Nov. 9 1926. 1,606,641

' A. KELLER SAFETY DEVICE AND HOLDER FOR DOORS Filed July 29. 1922 2 Sheets-Sheet 2 Patented Nov. 9, 1926.

UNITED STATE earner nnvicn Ann HOLDER non noons.

Application filed July 25,

This invention relates to improvements in door safety attachments or devices, and has particular reference to a knob actuated door catch.

The principal object of this invention is to provide means whereby the turning of the door knob permits a double function, the first function being the ordinary operation of the latch, and the second function being the operation of the auxiliary latch which is remotely placed and is adapted to retain the door in an open position.

Another object is to provide a simple mechanism of this character which may be placed upon any door now upon the market and is particularly applicable to doors which are subject to slamming such as railway coaches.

A further object is to provide a structure of this nature which is simple in construction and therefore cheap to manufacture.

A still further object is to provide means whereby the auxiliary latch also acts as a bumper to prevent the door from slamming closed.

Other objects and advantages will be apparent during the course of the following description.

In the accompanying drawings forming a part of this specification, and in which like numerals are employed to designate like parts throughout the same,

Figure 1 is a cross-section of a doorway showing a door in open position having my device applied thereto,

Figure 2 is a fragmentary elevation of a door having my invention applied thereto and shown partly in cross-section and taken on the line 2-2 of Figure 3,

Figure 3 is a fragmentary detail view showing the auxiliary latch engaging the wall stop,

Figure 4 is a top plan view showing the auxiliary latch contacting a bumper secured in the door casing,

Figure 5 is a perspective view of the actuating yoke,

Figure 6 is a detail cross-sectional view of the auxiliary latch and the associated parts of the door, and

Figures 7 and 8 are detail views of the actuating lever.

Applicant is aware of the fact that previous to this time various catches have been placed in the floor for the purpose of retain ing the door in open position. These catches,

1922. Serial No. erases.

however, have been operated by the foot and PATENT OFFICE.

consequently require an additional elfort in i order to open it,'or to unlatch it so that the same may be closed. I propose to overcome this difficulty by providing a latch which is actuated by. the knob of the door in such a manner that as the knob is rotated, the ordinary latch will operate as well as the auxiliary latch which is remotely placed.

In the accompanying drawings wherein for the purpose of illustration is shown a preferred embodiment of my invention, the numeral 9 represents the usual door casing having an upper rail 11 and a sill 12, while the numeral 13 represents the door as a whole, which door, in Figure 1, is shown in an open position. The customary hinges 14: and 16 are provided upon which the door swings. At 17, I have shown a door knob mounted so as to rotate on a casing 18. This casing may be on the opposite side of the door from the lock casing 19 as shown in Figure 3, or may be superimposed upon the block case itself depending entirely upon the desire of the user. A knob 21 is also provided on the opposite side of the door and is connected to the knob 17 as by the usual squared shaft 22. This shaft 22 passes through a squared, hole 23 formed in the hub 24 of an actuating lever 26. This actuating lever is best shown in Figures 2, 7 and 9 Where it will be noted that the oppositely extending arms of the actuating lever 26. rest upon lugs'27 and 28 formed integral withthe yoke 29. This yoke 29'is adapted to straddle the hub 2a of the actuating lever as best shown in Figure 2.

It will be observed by viewing Figures 2 and 5 that a guide pin 31 extends downwardly through an opening 32 in the lower portion of the casing 18 while a rod screw threaded as shown at 34 extends upwardly from this yoke and may be adjusted with respect to the yoke through the medium of the screw threads 34 entering one leg of this yoke, as best shown in Figure 5. This rod 33 extends upwardly and is preferably enclosed throughout a substantial part of its length as by a moulding 36. By the use of this moulding my device does not detract from the appearance of the door. The upper end of this rod 33 is provided with a hook 37 extending through an opening 38 formed in the lower extremity of the bolt- 39. This bolt passes through a housing 41 so that its upper extremity 42 normally lies above the upper margin of the door. A. spring 43 has one end secured to the bolt 39 and has its opposite end bearing against the bottom of the housing 41 with the result that this spring normally tends to project the bolt 39 in an upward direction. This motion is also transmitted through the rod 33 to the yoke 29, thus holding the lugs 27 and 28 against the under side of the lever 26. Mounted upon the wall 44 is a bracket 46 whichis provided with outwardly extendinglugs 47 between which is pivoted a spring pressed dog 48 having a hooked outer extremity 49 and a downwardly e2:- tending lug 51. This lug is normally in contact with the bracket 46 and is so held by an expansion spring engaging the bracket 46 and the lever 48. Located on the upper rail 11 is ,a retainer 53 whichretainer holds a rubber bumper 54, which bumper is placed on line with the upper extremity 42 of the bolt 39 as best shown in Figure 4, the purpose of which is that if the door swings toward its closed position, the bolt 39 will strike the bumper and prevent the slamming of the door.

The operation of my device is as fol- Assuming that the door is closed, rotation of the knob will cause the lever 26 to press downwardly on either the lug 27 or 28 depending upon the direction of rotation of the knob. This rotation of the knob withdraws the usual latch 56 from its keeper 57 and at the same time movement of the yoke 29 will withdraw the bolt 39 from its engagement with the top of the door casing. When the dOOr is swung to its fully open position, the dog 48 will move upwardly and will allow the bolt 39 to pass thereunder. This upward movement is transmitted through the action of the spring 52. 'While thedoor is in this position, it will be retained against swinging movement until the knob is again grasped and rotated so as to withdraw the bolt 39 from the dog 48.

It will thus be seen that I have provided a very simple means for preventing a door from slamming either open or closed, and one which may be applied to any door now upon the market without necessitating expensive alterations.

It is to be understood that the form of my invention herewith shown and described is to be taken as a preferred example of the same, and that various changes in the shape,

and arrangement of parts may be resorted to without departing from the spirit of the invention or the scope of the subjoined claim.

Having thus described my invention, I claim In a device of the character described, the combination with a door having latch mechanism mounted thereon, said latch mechanism comprising a latch, a rotatable knob controlling the movement of said latch, a shaft secured to said knob, a lever secured to said shaft, a casing surrounding a portion of said shaft and enclosing said lever, a yoke adapted to straddle said shaft at a point within said casing, a guide pin extending through said casing, said guide pin being secured to said yoke, a rod secured to said yoke, an auxiliary latch mechanism po sitioned adjacent the upper extremity of said door, said latch mechanism bein operatively connected to said rod, a bumper secured at a point outside of the margin of said door and in line with said auxiliary latch so as to be contacted thereby for the purpose of preventing the closing of said door previous to the withdrawal of said auxiliary latch.

In testimony whereof I affix my signature. A

' ABRAHAM KELLER. 

